Family Opisthoproctidae (ray-finned fish)
Actinopteri - Argentiniformes - Opisthoproctidae
Parent taxon: Argentiniformes according to R. Betancur et al. 2013
See also Jordan 1963 and Nelson et al. 2016
Sister taxa: Argentinidae, Argentinoidei, Bathylagidae, Microstomatidae
Subtaxa: Dolichopteryx
Ecology:
Distribution: there are no occurrences of Opisthoproctidae in the database